کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1784712 1524129 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lock-in thermographic inspection of squats on rail steel head
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک اتمی و مولکولی و اپتیک
پیش نمایش صفحه اول مقاله
Lock-in thermographic inspection of squats on rail steel head
چکیده انگلیسی

The development of squat defects has become a major concern in numerous railway systems throughout the world. Infrared thermography is a relatively new non-destructive inspection technique used for a wide range of applications. However, it has not been used for rail squat detection. Lock-in thermography is a non-destructive inspection technique that utilizes an infrared camera to detect the thermal waves. A thermal image is produced, which displays the local thermal wave variation in phase or amplitude. In inhomogeneous materials, the amplitude and phase of the thermal wave carries information related to both the local thermal properties and the nature of the structure being inspected. By examining the infrared thermal signature of squat damage on the head of steel rails, it was possible to generate a relationship matching squat depth to thermal image phase angle, using appropriate experimental/numerical calibration. The results showed that with the additional data sets obtained from further experimental tests, the clarity of this relationship will be greatly improved to a level whereby infrared thermal contours can be directly translated into the precise subsurface behaviour of a squat.


► It is outlined the use of lock-in thermography process for detecting squats in track.
► The lock-in thermography results agree with the experimental observation.
► The reported method can be used to defect the location and the depth of squats.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Infrared Physics & Technology - Volume 57, March 2013, Pages 89–95
نویسندگان
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